A Case with Adenoma of Appendix that Detected by Colonoscopy.

Sobao Y., Koganei K., Ike H., Eguchi K., Shizawa R., Ookubo K., Kikuchi M., Sakashita T., Oki S., Shimada H., Suzuki Y.

doi:10.3862/jcoloproctology.50.355

This is a report of a case with adenoma of the appendix, which was detected by screening colonoscopy. The case was a 73-year-old male without any symptom. The adenoma was observed as a polyp protruding from the orifice of the appendix. He was admitted to our hospital, and appendectomy and partial resection of the cecum was done.<BR>In the resected specimen, the adenoma was a pedunculated polyp : the head was 6mm in diameter and the stalk 2mm in length. The base of the stalk was in the proximal site of the appendix.<BR>Histological examination showed a typical tubular adenoma.<BR>Adenoma of the appendix is rare; the frequency is 0.02-0.08% in resected specimens. In Japan, only 9 cases had been reported and this is the tenth case. It is difficult to diagnose preoperatively, and most adenomas of the appendix are discovered after resection due to appendicitis. Adenoma of the appendix should be resected, because villous adenoma is the most frequent type that has high malignant potentiality.

A Case with Adenoma of Appendix that Detected by Colonoscopy.

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